v3.26.1
Form N-1A Cover
Mar. 27, 2026
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name SPIRIT OF AMERICA INVESTMENT FUND, INC.
Entity Central Index Key 0001039667
Entity Investment Company Type N-1A
Document Period End Date Mar. 27, 2026
Prospectus Date Mar. 30, 2026